﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ReplaceString
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = "I'm C# developer and I like to develop for windows mobile";   
            string result = input.StringReplace("developer", "tester");

            Console.WriteLine(result);
            Console.Read();
        }
    }
}
